【摘要】：試驗(yàn)旨在研究不同β-受體激動(dòng)劑添加模式對(duì)肉牛血液生化指標(biāo)和激素水平的影響。選取15頭體況良好、體重相近(257.9kg±33.3kg)的西門塔爾肉牛,隨機(jī)分為3組,每組5頭。對(duì)照組飼喂基礎(chǔ)日糧;試驗(yàn)Ⅰ組添加萊克多巴胺,添加劑量為670.0μg/kg體重;試驗(yàn)Ⅱ組添加萊克多巴胺、沙丁胺醇和克倫特羅的混合物,添加劑量分別為223.3、50.0、5.3μg/kg體重。給藥期28d,停藥期28d。結(jié)果表明,與對(duì)照組相比,在給藥第28天時(shí),試驗(yàn)Ⅰ組肉牛血漿中游離脂肪酸(FFA)濃度顯著降低(P0.05),試驗(yàn)Ⅱ組肉牛血漿中葡萄糖(GLU)和游離脂肪酸濃度均顯著降低(P0.05);整個(gè)試驗(yàn)過程中,除停藥第28天時(shí)試驗(yàn)Ⅰ組肉牛血漿中胰島素(INS)水平顯著高于對(duì)照組外(P0.05),β-受體激動(dòng)劑對(duì)各試驗(yàn)組血漿中激素水平均無顯著影響(P0.05)。綜合上述試驗(yàn)結(jié)果,肉牛血漿中的FFA可作為β-受體激動(dòng)劑潛在的生物標(biāo)志物,可通過對(duì)其的監(jiān)測(cè)來監(jiān)管β-受體激動(dòng)劑在肉牛生產(chǎn)環(huán)節(jié)中的非法使用。
[Abstract]:The aim of this study was to study the effects of different 尾-agonist supplementation patterns on blood biochemical indexes and hormone levels in beef cattle. Fifteen Simmental beef cattle with good body condition and similar body weight (257.9kg 鹵33.3kg) were randomly divided into 3 groups with 5 heads in each group. The control group was fed basic diet, the control group was fed with ractopamine at a dose of 670.0 渭 g/kg body weight, and the experimental group 鈪，

本文編號(hào)：2170557